/* Arc Monitor – shop-floor dashboard. Steel neutrals, one arc-orange accent. */
:root {
  --bg: #eef1f0; --panel: #ffffff; --ink: #18201e; --muted: #5b6965; --line: #d3dbd8; --chip: #e7ecea;
  --accent: #c2591a; --accent-soft: #f7e3d4; --ok: #1e8a4c; --ok-soft: #dcf1e4; --off: #8a9693; --off-soft: #e3e8e6;
  --danger: #b3261e;
  --f-display: "IBM Plex Sans Condensed", "Arial Narrow", system-ui, sans-serif;
  --f-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111615; --panel: #192120; --ink: #e4ece9; --muted: #9aaaa5; --line: #2c3735; --chip: #222c2a;
    --accent: #ec8a45; --accent-soft: #3d2615; --ok: #4fca82; --ok-soft: #173325; --off: #74817e; --off-soft: #222b29;
    --danger: #f2867f; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font: 14px/1.5 var(--f-body); }
[hidden] { display: none !important; }
h1 { font: 700 26px/1.1 var(--f-display); margin: 0; }
h2 { font: 600 17px/1.2 var(--f-display); margin: 22px 0 8px; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
code { font-family: var(--f-mono); font-size: 12.5px; background: var(--chip); padding: 1px 5px; border-radius: 4px; }
.err { color: var(--danger); margin: 8px 0 0; }

.brand { display: flex; align-items: center; gap: 8px; font: 700 18px var(--f-display); letter-spacing: .02em; }
.arc-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

/* buttons and inputs */
.btn { font: 600 13.5px var(--f-body); color: var(--ink); background: var(--panel); border: 1px solid var(--line);
       border-radius: 6px; padding: 7px 14px; cursor: pointer; }
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.ghost { background: transparent; }
.btn.small { padding: 4px 10px; font-size: 12.5px; }
.btn.danger { color: var(--danger); }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
input, select { font: 14px var(--f-body); color: var(--ink); background: var(--panel); border: 1px solid var(--line);
                border-radius: 6px; padding: 6px 9px; }
label { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13px; }

/* login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 28px;
              width: min(360px, 100%); display: flex; flex-direction: column; gap: 10px; }
.login-card label { display: block; }
.login-card input { width: 100%; }

/* header */
.top { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
       background: var(--panel); border-bottom: 1px solid var(--line); padding: 10px 20px; }
#tabs { display: flex; gap: 2px; flex-wrap: wrap; flex: 1; }
#tabs button { font: 600 14px var(--f-display); color: var(--muted); background: none; border: 0; padding: 8px 12px;
               border-radius: 6px; cursor: pointer; }
#tabs button.on { color: var(--ink); background: var(--chip); }
main { max-width: 1280px; margin: 0 auto; padding: 20px; }
.head-row { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 14px; }

/* KPIs */
.kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.kpi { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.kpi .v { font: 700 26px/1.1 var(--f-display); font-variant-numeric: tabular-nums; }
.kpi .l { color: var(--muted); font-size: 12.5px; }

/* machine cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 14px; display: flex;
        flex-direction: column; gap: 10px; }
.card.arcing { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.card .name { font: 700 19px var(--f-display); }
.card .id { font-family: var(--f-mono); font-size: 12px; color: var(--muted); }
.card .row { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.card .big { font: 700 24px var(--f-display); font-variant-numeric: tabular-nums; }
.card .meta { display: flex; gap: 12px; flex-wrap: wrap; font-size: 12px; color: var(--muted); font-family: var(--f-mono); }
.bar { height: 6px; background: var(--chip); border-radius: 3px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--accent); }
.pill { font: 600 11.5px var(--f-body); letter-spacing: .04em; text-transform: uppercase; padding: 3px 9px; border-radius: 999px; white-space: nowrap; }
.pill.arc { background: var(--accent); color: #fff; animation: glow 1.2s ease-in-out infinite; }
.pill.idle { background: var(--ok-soft); color: var(--ok); }
.pill.off { background: var(--off-soft); color: var(--off); }
.pill.dis { background: var(--chip); color: var(--muted); }
.pill.test { background: transparent; color: var(--accent); border: 1px dashed var(--accent); padding: 2px 8px; }
@keyframes glow { 50% { opacity: .65; } }
@media (prefers-reduced-motion: reduce) { .pill.arc { animation: none; } }

/* panels, filters, tables */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; margin-bottom: 12px; }
.row-form { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.row-form .full { flex-basis: 100%; margin: 0; }
.filters { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.quick { display: flex; gap: 4px; flex-wrap: wrap; }
.quick button { font: 500 12.5px var(--f-body); color: var(--ink); background: var(--chip); border: 0; border-radius: 999px; padding: 5px 11px; cursor: pointer; }
.quick button.on { background: var(--ink); color: var(--bg); }
.tbl { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; font-size: 13px; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font: 600 12px var(--f-display); letter-spacing: .04em; text-transform: uppercase; color: var(--muted); background: var(--panel); position: sticky; top: 0; }
td.n, th.n { text-align: right; }
td.mono { font-family: var(--f-mono); font-size: 12.5px; }
tr:last-child td { border-bottom: 0; }
tr.total td { font-weight: 600; background: var(--chip); }
.flag { color: var(--accent); font-size: 12px; }
.empty { padding: 18px; color: var(--muted); text-align: center; }

.chart { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px; overflow-x: auto; }
.chart svg text { fill: var(--muted); font: 11px var(--f-mono); }

.keybox { border-color: var(--accent); background: var(--accent-soft); }
.keybox .key { font: 600 16px var(--f-mono); background: var(--panel); padding: 4px 10px; border-radius: 6px; user-select: all; }

.toast { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); background: var(--ink); color: var(--bg);
         padding: 9px 16px; border-radius: 8px; font-size: 13.5px; z-index: 20; max-width: calc(100% - 32px); }
.toast.bad { background: var(--danger); color: #fff; }

@media (max-width: 760px) {
  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  main { padding: 14px 16px; }
  .top { padding: 8px 16px; gap: 6px; }
  .top .brand { flex: 1; }
  #tabs { order: 3; flex: 1 0 100%; flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
  #tabs button { flex: none; padding: 6px 10px; }
}